Optics and Vision

Play an AI-generated podcast conversation about this lesson

What is the effect of a larger pupil on the depth of field?

It has no effect on the depth of field

It decreases the depth of field (correct)

It increases the depth of field

It is dependent on the available light

What is the optimal pupil diameter range for the corrected eye?

4-5 mm

1-2 mm

3-4 mm

2-3 mm (correct)

What is the role of retinol in the eye?

Aiding in the production of moisture in the eyes

Supporting the healthy functioning of the conjunctiva

Allowing for vision in low light conditions (correct)

All of the above

What is the term for the ability to perceive distance to objects in the world using the visual system and visual perception?

Depth perception Signup and view all the answers

What is the effect of aberrations on retinal image quality for large pupil diameters?

They deteriorate retinal image quality Signup and view all the answers

What is the benefit of vitamin A in relation to eye health?

It decreases the chance of developing eye infections Signup and view all the answers

What is the primary function of the sphincter pupillae muscle in the eye?

To constrict the pupil Signup and view all the answers

During near visual acuity testing, where should the light source be placed?

Above or slightly behind the patient Signup and view all the answers

What is the purpose of the Light Perception (LP) test?

To assess the patient's ability to see light Signup and view all the answers

What is the calibrated distance for holding the near point card during visual acuity testing?

16 in (40cm) Signup and view all the answers

What is the term for the aperture or opening of the eye?

Pupil Signup and view all the answers

What is the name of the nerve that innervates the sphincter pupillae muscle?

3rd CN Signup and view all the answers

What is the term used to describe the aberrations that occur in a circular form?

Zernike polynomials Signup and view all the answers

What is the primary effect of spherical aberration in the eye?

Formation of secondary images in front of the normal focal point Signup and view all the answers

What is the purpose of the iris in reducing spherical aberration?

To act as a stop to reduce spherical aberration Signup and view all the answers

What type of distortion occurs when using a minus lens?

Barrel distortion Signup and view all the answers

What is the term used to describe the ability to detect a gap with a width of 1 minute of arc?

Normal resolving power Signup and view all the answers

Which type of visual acuity involves the minimum contrast of a target at which the patient can distinguish the target from the background?

Minimum visible threshold Signup and view all the answers

What is the term used to describe the smallest visual angle formed by the eye and 2 separate objects at which a patient can discriminate them individually?

Minimum separable threshold Signup and view all the answers

What is the term used to describe the smallest detectable amount of misalignment of 2 line segments?

Hyperacuity Signup and view all the answers

What is the primary reason for impairment of visual acuity when the pupil is dilated?

Spherical aberration Signup and view all the answers

What is the effect of the Stiles-Crawford effect on visual acuity?

Increased sensitivity to paraxial light Signup and view all the answers